After each project, the user can rate you on a few dimensions (communication, quality, and value) and optionally leave a public review. You won't see individual per-project ratings, only the averages that show on your profile. Public reviews are visible to anyone browsing your profile.
What's on your profile
Your profile shows your stats: total requests received, response rate, completed and canceled project counts, and your rating averages once there's enough data to be meaningful.